Specific details about the malfunction were not immediately disclosed.

The Convention Center released the following statement on Wednesday afternoon:

One of the Pennsylvania Convention Center’s escalators experienced a mechanical malfunction today. We take the safety of any and all guests in our facility very seriously and will be conducting a full investigation to determine the cause of the unfortunate incident. We extend our heartfelt apologies to any individuals who were injured or otherwise impacted by the malfunction.

The escalator has been taken out of service pending a full inspection and investigation of potential causes. The appropriate authorities have been notified and will receive our full cooperation.

All seven victims suffered minor injuries and were transported to local hospitals in stable condition.

The Occupational Safety & Health Administration (OSHA) has been notified about the incident.